If a node and paragraph both contain field_x, only one of the two fields is considered

Problem/Motivation

if a paragraph and node both contain field_x, then BackReferenceFinder::getReferencingFieldList() will return:

[
  'field_x' => $field_object,
]

where $field_object can be either field_x for node or for paragraph.

Steps to reproduce

Create the same field name for different entity types and run BackReferenceFinder::getReferencingFieldList().

Proposed resolution

BackReferenceFinder::getReferencingFieldList() could return something like:

[
  'node.field_x' => $field_object,
  'paragraph.field_x' => $field_object,
]

Remaining tasks

User interface changes

API changes

Data model changes